Welcome

Join us for our weekly Monday evening duplicate bridge game for non-Life Masters. This is a sanctioned ACBL bridge game for new bridge players with aspirations of enjoying the pleasures of modern bridge anywhere in the world.

Lately I've had some timely questions about a practice that seems to have become common especially among novice and intermediate players. I had an email from a director in Palm Desert who has noticed this practice, and a question about it at my most recent summer bridge class.

Players, as dummy, have been routinely reminding declarer which hand they're in. The common thing is tapping the table to remind declarer that she's "on the board."

When it was brought up in class, I said, "Well it has to stop!" which got a bit of a chuckle.

Let me go into detail about dummy's rights and privileges. They're quite explicitly called out in the Laws of Duplicate Bridge.

The 2017 edition of the Laws of Duplicate Bridge brought in many small changes, and one huge one: Law 23, the Comparable Call rule. The intent is to preserve a bridge result in place of the rather severe penalties of earlier laws. It's not a bad thing, but we'll be adapting to it for quite a while.

Imagine this situation: LHO (Left-hand opponent) is the dealer, but you're distracted with a good hand and you put down a 1♠ bid. The director is called, and your bid-out-of-turn is not accepted by the opponents.

The director cancels your bid, and the auction reverts to LHO who passes. Your partner has no restrictions, but is not allowed to act on the unauthorized information of your 1♠ bid. Partner opens 1♥. RHO passes.

Team-of-four games at bridge use somewhat different scoring from the matchpoint pair games we usually play. It's actually much better in terms of "pure bridge." Matchpoint scoring tends to distort and magnify very small differences in score, and reduce the impact of large differences.

My desk with computer monitor and Dealer4 machine. On the screen is the Dealer4 software with a hand displayed.

Most players take my word when I say, "The hands are randomly generated and dealt to the boards by a machine." That's all true as far as it goes, but what does it really mean?

Let me give you a peek behind the curtain and show you what it takes to make pre-dealt hands and hand records for a duplicate pairs game1.

Since the early days of generating bridge deals by computer, quite a bit of research has gone into the mathematics involved. Early random number generators were woefully inadequate for being able to replicate a hand-shuffled deck of cards.

Lynn Sager and Adam Barron picked up almost two silver points for their 65% game in the May 7 BridgeMojo STaC game. Close behind were Rosemary Schroeder with Hilary Clark, and Dona Clark with Carolyn Buzin.

From the posted results, it appears that there were two clubs playing 749er games on Monday evening, BridgeMojo and the Bridge Gallery in Northern California. The table count was 16.5 total tables.

Last week was our first trial-run for having a pair of BBO (BridgeBase Online) robots fill a half-table at the BridgeMojo game.

What's wrong with having a sit-out?

Normally when the game has a half-table, on every round there's a pair who can't play. That pair has a 15-minute break. For the BridgeMojo game, that means seven pairs in the game will play twelve boards, and the rest will play fourteen.

To compensate for the difference, the total matchpoint score for those pairs is factored before comparing it with the other pairs in the game. Their final score is multiplied by 14/12 (7/6, 1.166). (Remember your fractions?) That brings every player up to a common baseline score.